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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 289 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.53 × 4 =
  2. 2.13 × 8 =
  3. 3.17 × 8 =
  4. 4.23 × 8 =
  5. 5.52 × 4 =
  6. 6.65 × 4 =
  7. 7.29 × 8 =
  8. 8.13 × 4 =
  9. 9.30 × 4 =
  10. 10.16 × 4 =
  11. 11.64 × 4 =
  12. 12.70 × 4 =
  13. 13.20 × 4 =
  14. 14.60 × 4 =
  15. 15.20 × 8 =
  16. 16.39 × 8 =
  17. 17.67 × 4 =
  18. 18.19 × 4 =
  19. 19.26 × 4 =
  20. 20.23 × 4 =
  21. 21.12 × 4 =
  22. 22.29 × 4 =
  23. 23.35 × 8 =
  24. 24.15 × 8 =
  25. 25.33 × 8 =
  26. 26.14 × 8 =
  27. 27.26 × 8 =
  28. 28.46 × 4 =
  29. 29.34 × 4 =
  30. 30.28 × 4 =
  31. 31.18 × 8 =
  32. 32.37 × 4 =
  33. 33.72 × 4 =
  34. 34.37 × 8 =
  35. 35.43 × 4 =
  36. 36.38 × 8 =
  37. 37.25 × 8 =
  38. 38.22 × 4 =
  39. 39.24 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 212
  2. 104
  3. 136
  4. 184
  5. 208
  6. 260
  7. 232
  8. 52
  9. 120
  10. 64
  11. 256
  12. 280
  13. 80
  14. 240
  15. 160
  16. 312
  17. 268
  18. 76
  19. 104
  20. 92
  21. 48
  22. 116
  23. 280
  24. 120
  25. 264
  26. 112
  27. 208
  28. 184
  29. 136
  30. 112
  31. 144
  32. 148
  33. 288
  34. 296
  35. 172
  36. 304
  37. 200
  38. 88
  39. 192
  40. 132

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